pg_stat_progress_vacuum.delay_time · Statistics & Metrics

Description

Total time spent sleeping due to cost-based delay (see Section 19.10.2), in milliseconds (if track_cost_delay_timing is enabled, otherwise zero). This includes the time that any associated parallel workers have slept. However, parallel workers report their sleep time no more frequently than once per second, so the reported value may be slightly stale.

View: pg_stat_progress_vacuum
Field: delay_time
SQL type: double precision
Units named in the field definition: milliseconds
Reset observation: No stats_reset field is documented for this view

Usage

SELECT delay_time FROM pg_catalog.pg_stat_progress_vacuum;

View semantics

Whenever VACUUM is running, the pg_stat_progress_vacuum view will contain one row for each backend (including autovacuum worker processes) that is currently vacuuming. The tables below describe the information that will be reported and provide information about how to interpret it. Progress for VACUUM FULL commands is reported via pg_stat_progress_cluster because both VACUUM FULL and CLUSTER rewrite the table, while regular VACUUM only modifies it in place. See Section 27.4.2.

Collection and reset context

Read the same-version statistics collection and view documentation below for reset scope and visibility. No per-field reset rule is inferred from the field name.

Inspect this field

Example query; no execution result or measured value is asserted.

SELECT delay_time FROM pg_catalog.pg_stat_progress_vacuum;

Related entries

Documentation and source

PostgreSQL 18 English manual

Source build

Version: 18.6
Build: https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2
Source fingerprint: 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

Compare versions

PostgreSQL 17 → 18: added.

--- PostgreSQL 17
+++ PostgreSQL 18
@@ -1 +1,8 @@
-Not recorded in this version
+{
+  "field": "delay_time",
+  "sql_type": "double precision",
+  "units_mentioned": [
+    "milliseconds"
+  ],
+  "view": "pg_stat_progress_vacuum"
+}

Compares recorded interfaces and attributes. Source fingerprints and build metadata are excluded; an absent sample is not proof of the introduction or removal release.